Orlando Science Center will welcome Stormtroopers, Jedi knights, six R2-D2 units and other characters as a farewell to its "Star Wars: Where Science Meets Imagination" exhibit.

The droids, presented by the R2 Builders Club, along with costumed members of the 501st Legion, Rebel Legion and Mandalorian Mercs, will descend upon the science center from 1 p.m. to 5 p.m. on Saturday. The exhibit's final day in Orlando is Sunday.

The "Star Wars" exhibit spotlights models, costumes, props and other relics from the six films, video interviews with filmmakers and scientists, and labs where guests test their own speeders and robots.

"Where Science Meets Imagination" is included with regular Orlando Science Center admission, as is all four floors of exhibits and movies. Tickets are $27 apiece ($20 for ages 3-11). Science-center hours are 10 a.m.-5 p.m.